Firebeetle 2 High power consumption during deep sleep
Mohammad Nabil.El Kotob 2025-01-28 19:01:24 897 Views6 Replies hi;
previously I had Firebeetle ESP32 (DFR 0478) which used to consume 11uA during deep sleep as expected, i have purchased qty 2 Firebeetle 2 ESP32-E N16R2 (DFR 1139)
and with same setup both are consuming 174 uA during deep sleep even after cutting the low power pad far away from the 10uA mentioned in product data sheet.
I am using NORDIC PPK II to measure the current, Arduino IDE ver. 1.8.10 running on window platform, and the basic deep sleep sketch without any sensors connected to the board. kindly advise what could the problem be?
Hi Mohammad, thanks for the tip. Unfortunately the picture you uploaded with the resistor's position is no longer visible and I could find it on the schematics. Would you be so kind to repost it?? Thanks a lot!
pippo.pluto this was super helpful! For the DFR1140, I removed the same part and got a deep sleep current of 10-11uA. I haven't tested it yet with my original code to see how it affects functionality yet.
Cheers!
Gregory.Lee I just purchased a DFR1140 Firebeetle 2 as well and even with no code running other than deep sleep, I'm seeing ~170uA as well. This is also with the low power trace cut. Using a Fluke 8808A to measure the current.
Gregory.Lee hi;
I've been in touch with DFROBOT technical support team and they confirmed that this is the correct Deep Sleep current unlike what is mentioned in the product data sheet which they will adjust.
however; they suggested to do a modification to the hardware as below:
The reason for the high power consumption of DFR1139 is that the peripheral circuit design of Loxin module requires pull-up of IO16, which cannot be suspended. So if users need low power consumption, you can remove the original 10k resistor to 1M resistor.
Resistor position is here, please proceed with caution. Resistor Parameter:0402 10K
i have done the modification and Deep Sleep current dropped to 18uA, but I am not sure if this affects the overall performance of the module. you have to try for your self.
